Help putting /var in /home partition

We have observed /var partition growing on us very rapidly. We are clearing the logs and Exim spool but this won't be sufficient for the future. We were thing in moving /var into /home partition and wondering if there will be any problems or precaution we have to have in mind.
Also, if anyone would help in step-by-step process I would be thankful!

Be aware that MySQL databases are stored in /var/lib/mysql and some configuration and logs are stored in /var/cpanel . For that reason, I would encourage you to keep the paths intact - keep it as /var rather than /home/var or something like that.